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Cost-effectiveness analysis of dolutegravir plus backbone compared with raltegravir plus backbone, darunavir+ritonavir plus backbone and efavirenz/tenofovir/emtricitabine in treatment naïve and experienced HIV-positive patients

Authors Restelli U, Rizzardini G, Antinori A, Lazzarin A, Bonfanti M, Bonfanti P, Croce D

Received 2 March 2017

Accepted for publication 5 May 2017

Published 29 June 2017 Volume 2017:13 Pages 787—797

DOI https://doi.org/10.2147/TCRM.S135972

Checked for plagiarism Yes

Review by Single-blind

Peer reviewers approved by Dr Hoa Le

Peer reviewer comments 2

Editor who approved publication: Professor Garry Walsh

Umberto Restelli,1,2 Giuliano Rizzardini,3,4 Andrea Antinori,5 Adriano Lazzarin,6 Marzia Bonfanti,1 Paolo Bonfanti,7 Davide Croce1,2

1Centre for Research on Health Economics, Social and Health Care Management, LIUC – Università Cattaneo, Castellanza, Varese, Italy; 2School of Public Health, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa; 3First and Second Divisions of Infectious Diseases, “Luigi Sacco” Hospital, Milan, Italy; 4School of Clinical Medicine, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa; 5National Institute for Infectious Diseases “L Spallanzani”, Rome, 6Department of Infectious Diseases, San Raffaele Scientific Institute, 7Department of Infectious and Tropical Diseases, A Manzoni Hospital, Lecco, Italy

Background: In January 2014, the European Medicines Agency issued a marketing authorization for dolutegravir (DTG), a second-generation integrase strand transfer inhibitor for HIV treatment. The study aimed at determining the incremental cost-effectiveness ratio (ICER) of the use of DTG+backbone compared with raltegravir (RAL)+backbone, darunavir (DRV)+ritonavir(r)+backbone and efavirenz/tenofovir/emtricitabine (EFV/TDF/FTC) in HIV-positive treatment-naïve patients and compared with RAL+backbone in treatment-experienced patients, from the Italian National Health Service’s point of view.
Materials and methods: A published Monte Carlo Individual Simulation Model (ARAMIS-DTG model) was used to perform the analysis. Patients pass through mutually exclusive health states (defined in terms of diagnosis of HIV with or without opportunistic infections [OIs] and cardiovascular disease [CVD]) and successive lines of therapy. The model considers costs (2014) and quality of life per monthly cycle in a lifetime horizon. Costs and quality-adjusted life years (QALYs) are dependent on OI, CVD, AIDS events, adverse events and antiretroviral therapies.
Results: In treatment-naïve patients, DTG dominates RAL; compared with DRV/r, the ICER obtained is of 38,586 €/QALY (6,170 €/QALY in patients with high viral load) and over EFV/TDF/FTC, DTG generates an ICER of 33,664 €/QALY. In treatment-experienced patients, DTG compared to RAL leads to an ICER of 12,074 €/QALY.
Conclusion: The use of DTG+backbone may be cost effective in treatment-naïve and treatment-experienced patients compared with RAL+backbone and in treatment-naïve patients compared with DRV/r+backbone and EFV/TDF/FTC considering a threshold of 40,000 €/QALY.

Keywords: antiretroviral therapy, costs, economic evaluation, cost-utility analysis

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